personnel has been evacuated from benghazi. tom fitzgerald has the latest on the investigation. >> reporter: at first it appeared to be an out of control demonstration by muslim protesters in libya upset over a movie they claim mocks muhammad. but the demonstration may have been a cover. its been indicated islamic extremists used the crisis town leash a premeditated assault on the u.s. symbol on the 9/11 anniversary. >> the united states condemns in the strongest terms this outrageous and shocking attack. >> reporter: speaking in the rose garden president barack obama condemned the attacks and killing of u.s. ambassador chris stevens. >> we jean all efforts to denigrate -- we reject all efforts to denigrate the religious beliefs of others, but there is absolutely no justification to this type of senseless violence. >> reporter: the president then went to the state departmento mourn with employees while his secretary of state said the libyan government was not involved. >> a free and stable libya is still in america's interest a